mm/hugetlb: simplify the code when alloc_huge_page() failed in hugetlb_no_page()

Rework the error handling code when alloc_huge_page() failed to remove
some duplicated code and simplify the code slightly.

Link: https://lkml.kernel.org/r/20210308112809.26107-5-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index c3d47af..c8f0a38 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4395,13 +4395,10 @@ retry:
                         * sure there really is no pte entry.
                         */
                        ptl = huge_pte_lock(h, mm, ptep);
-                       if (!huge_pte_none(huge_ptep_get(ptep))) {
-                               ret = 0;
-                               spin_unlock(ptl);
-                               goto out;
-                       }
+                       ret = 0;
+                       if (huge_pte_none(huge_ptep_get(ptep)))
+                               ret = vmf_error(PTR_ERR(page));
                        spin_unlock(ptl);
-                       ret = vmf_error(PTR_ERR(page));
                        goto out;
                }
                clear_huge_page(page, address, pages_per_huge_page(h));